Application of an electronic nose for determination of pre‐pressing treatment of rapeseed based on the analysis of volatile compounds contained in pressed oil

Robert Rusinek , Aleksander Siger , Marzena Gawrysiak-Witulska , Ewa Rokosik , Urszula Malaga-Toboła , Marek Gancarz

Abstract

The article presents an attempt to use an electronic nose together with a new three-parameter method for generation of a digital smellprint in order to specify the mode of processing of rapeseed based on the analysis of volatile compounds contained in cold-pressed rapeseed oil. Prior to the pressing process, the seeds were roasted or improperly stored to obtain oil samples with varied technological quality. The quality of pressed oils was evaluated by determination of the acid value. Furthermore, changes in oil colour were assessed with the use of an imaging colorimeter. Volatile compounds were determined with the use of gas chromatography and an electronic nose with a metal oxide semiconductor (MOS) sensor matrix. It was found that the mode of seed pre-treatment before pressing did not change the colour of the oil significantly. However, it influenced the profile of volatile organic compounds and changed their proportions. Ketones represented the largest proportion of volatile compounds determined for roasted samples and those pressed from seeds moistened up to 25% (w.b.). Alcohols dominated in samples moistened up to 10 and 12%, terpenes were the dominant volatile compounds in samples roasted at 140 °C, and other volatile compounds dominated in samples moistened up to 10 and 20% (w.b.). In turn, esters and aromatic compounds accounted for the lowest proportion in the analysed samples. The results shown by the electronic nose were correlated with the presence of particular groups of volatile compounds in rapeseed oil.
Author Robert Rusinek - [Polska Akademia Nauk]
Robert Rusinek,,
-
- Polska Akademia Nauk
, Aleksander Siger - [Uniwersytet Przyrodniczy w Poznaniu]
Aleksander Siger,,
-
- Uniwersytet Przyrodniczy w Poznaniu
, Marzena Gawrysiak-Witulska - [Uniwersytet Przyrodniczy w Poznaniu]
Marzena Gawrysiak-Witulska,,
-
- Uniwersytet Przyrodniczy w Poznaniu
, Ewa Rokosik - [Uniwersytet Przyrodniczy w Poznaniu]
Ewa Rokosik,,
-
- Uniwersytet Przyrodniczy w Poznaniu
, Urszula Malaga-Toboła (FoPaPE / Department of Production Engineering, Logistics and Applied Computer Science)
Urszula Malaga-Toboła,,
- Department of Production Engineering, Logistics and Applied Computer Science
, Marek Gancarz - [Polska Akademia Nauk]
Marek Gancarz,,
-
- Polska Akademia Nauk
Journal seriesInternational Journal of Food Science and Technology, ISSN 0950-5423, e-ISSN 1365-2621, (N/A 70 pkt)
Issue year2020
Vol55
No5
Pages2161-2170
Publication size in sheets0.5
Keywords in EnglishCold-pressed oil, electronic nose, gas chromatography-mass spectrometry, rapeseed, volatile organic compounds
ASJC Classification1106 Food Science; 2209 Industrial and Manufacturing Engineering
DOIDOI:10.1111/ijfs.14392
URL https://ifst.onlinelibrary.wiley.com/doi/abs/10.1111/ijfs.14392
Languageen angielski
Score (nominal)70
Score sourcejournalList
Publication indicators WoS Citations = 3; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 0.929; WoS Impact Factor: 2018 = 2.281 (2) - 2018=2.201 (5)
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